665042565240566 has 8 divisors (see below), whose sum is σ = 997643787304320. Its totient is φ = 332494636139128.

The previous prime is 665042565240527. The next prime is 665042565240569.

It is a happy number.

665042565240566 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×665042565240566² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665042565240499 and 665042565240508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665042565240569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13323209381 + ... + 13323259296.

It is an arithmetic number, because the mean of its divisors is an integer number (124705473413040).

Almost surely, 2^{665042565240566} is an apocalyptic number.

665042565240566 is a deficient number, since it is larger than the sum of its proper divisors (332601222063754).

665042565240566 is a wasteful number, since it uses less digits than its factorization.

665042565240566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26646481158.

The product of its (nonzero) digits is 311040000, while the sum is 62.

The spelling of 665042565240566 in words is "six hundred sixty-five trillion, forty-two billion, five hundred sixty-five million, two hundred forty thousand, five hundred sixty-six".